<template>
  <div class="my-upload">
    <a-upload
      name="avatar"
      list-type="picture-card"
      class="avatar-uploader"
      :show-upload-list="false"
      action="http://192.168.60.17:18888/qcj/api/upload"
      :before-upload="beforeUpload"
      @change="handleChange"
    >
      <img v-if="imageUrl" :src="imageUrl" alt="avatar" />
      <div v-else>
        <a-icon :type="loading ? 'loading' : 'plus'" />
        <div class="ant-upload-text">
          Upload
        </div>
      </div>
    </a-upload>
  </div>
</template>

<script>
function getBase64(img, callback) {
  const reader = new FileReader()
  reader.addEventListener('load', () => callback(reader.result))
  reader.readAsDataURL(img)
}
export default {
  name: 'Upload',
  data() {
    return {
      loading: false,
      imageUrl: '',
    }
  },
  props: {},
  methods: {
    handleChange(info) {
      if (info.file.status === 'uploading') {
        this.loading = true
        return
      }
      if (info.file.status === 'done') {
        // Get this url from response in real world.
        getBase64(info.file.originFileObj, (imageUrl) => {
          this.imageUrl = imageUrl
          this.loading = false
        })
      }
    },
    beforeUpload(file) {
      const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png'
      if (!isJpgOrPng) {
        this.$message.error('You can only upload JPG file!')
      }
      const isLt2M = file.size / 1024 / 1024 < 2
      if (!isLt2M) {
        this.$message.error('Image must smaller than 2MB!')
      }
      return isJpgOrPng && isLt2M
    },
  },
}
</script>

<style>
.avatar-uploader > .ant-upload {
  width: 128px;
  height: 128px;
}
.ant-upload-select-picture-card i {
  font-size: 32px;
  color: #999;
}

.ant-upload-select-picture-card .ant-upload-text {
  margin-top: 8px;
  color: #666;
}
</style>
